(COMMENT #3)
The upstream field liner plates can be installed without a problem because the plates go under the upstream liners, and over the downstream side. Since the bumper is more on the upstream side, it doesn’t obstruct the installation. The bumpers do however obstruct the installation of the downstream field liner plates as they are currently designed. Once the field liner is pushed under the upstream side, the bumper beam is in the way and it can’t be pushed flat against the wall. To install these on the V17480 & 81 units, the plates had to be cut into to get around the bumper beams